Rotary refrigerating apparatus.



J. C. BEHTSCH.

ROTARY REFRIGERATING APPARATUS.

APPLICATION FILED FEB. 24. 1913. IIENEWED MAY I9. |914.

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J. C. BERTSCH.

ROTARY REFRIGERATING APPARATUS.

APPLICAHON FILED FEB. 24| |913. 1,145,226.

RENEWED MAY 19,1914.

Patented July 6, 1915.

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ROTARY REFHIGERATING APPARATUS.

APPLICATION HLED FEB. 24, |913. nENEwED MAY19.1914.

1,145,226; Patented July 6, 1915.

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TTOR/VEV 1. C. BERTSCH.

ROTARY REFRIGERATING APPARATUS.

APPLICATION FILED 155.211.1913. RENEwEo MAY 19.1914.

1,145,226; 1 Patented July 6, 1915.

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I. C. BERTSCH.

ROTARY REFRlGERATlNG APPARATUS.

APPLICATION FILED FEB. 24. I9I3.

RENEWED MAY 19.!914.

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J. C. BERTSCH. ROTARY REFRIGERATING APPARATUS.

APPLICATION FILED 11.24, 1913. HENEwED MA1/19,1914.

Patented July 6, 1915.

6 SHEETS-SHEET 5- WWA JOHN C..BERTSCH, 0F FORT WRTH, TEXAS.

ROTARY REFRIGERATING APPARATUS.

Specification of Letters Patent.

.Patented July 6, 1915.`

Application led February 24, 1913, Serial No. 750,439. Renewed May 19, 1914. Serielle.. 839,646.

To'all whom it may concern:

coupled condensing and refrigerating coils,

the entire combination rotating around a common axis. f i

My invention comprises an improved construction of the several `parts, comprising the complete apparatus,` and particularly improved arrangements for the regulation of the working pressures and cooling surfaces to make .them suitable for anykind of domestic or industrial service.

The chief object of my invention is to obvate most of the cost of attendance, and also all losses of lubricant and Working fluid.

Another object of my invention is to greatly reduce the power required for operating a refrigerating apparatus by working with nearly saturatedgases or vapors during the entire cycle of operation.

Still another object of my invention is to provide such a construction of the apparatus as will withstand high pressures, will work automatically, can be safely dismantled, which allows an exchange, en-` largement or modification of thecondensing and refrigerating surfaces in size and shape to suit all kinds of conditions, and which permits the regulation of the Working pressures to suit changing conditions and insures th'e most economical operation.

Another object of my invention'is to distribute the Working load over one whole, revolution; to secure a perfect circulation of the working fluid, and to prevent the accumulation of lubricating oil in the condensing and refrigeratng coils.

Other objects and advantages of my in vention will be'fully described in the following specification, and the novel features pointedl out in the claims.

Heretofore the rotary refrigerating apparatus was so constructed that it could not withstand high pressures, and it was therefore limited to the use of sulfurous anhydrid, which is the poorest refrigerating yfluid known. The older type of rotary apparatus, on account of its peculiar construction, permitted the operation of only one compression cylinder with one discharge for every revolution, thereby causing the machine to run idle for every one half of a revolution, and concentrating most of the zvorking load to a small part of each revolu- In the older type of rotary refrigerating 'apparatus the compressor is placed within cases in a great waste,4 in other cases in au great deficiency, and only ina few cases in an economical operation. All of these defects, omissions and disadvantages I correct with my invention, comprising a number of compressors, suitable for Working under` high pressures, preferably withthe Vbest refrigerating fluid known, namely anhydrous ammonia, which are mounted on a shaft and inclosed within a casing which forms either the whole or only a part of the refrigerator, or only an independent housing for the machinery, and to which are` coupled a condenser made of pipe coils, and also additional or independent refrigeratving surfaces consisting of pipecoils, alla arranged for regulating the working pressure at will, for ydisconnecting the condenser and refrigerator coils, and for operating one or a number of separate refrigerating tanks.

For a clear understanding of my inven- 3 is a plan View of a modified form of the shafts for compressors, condensers and refrigerator coils, with parts removed and the casing, pipe coils and tanks broken away. Fig. 4 is a. perspective View of the compressors and principal'working parts shown in Figs. 1 and 2 while in clockwise rotation, withl one half of the casing and the whole refrigerator tank removed. Fig. 5 is a section along line g/-y in Fig. 2, showing the compressor body with crank plates, cranks and rollers, the compressor shaft being broken off. Fig. 6 is a section along line z-z of Fig. 2, showing the compressor body with cross section through cylinder sleeves, piston and suction valve, and also a section of the cranks with their shaft. Fig. 7 is an enlarged section of the self closing liquid stop valves shown in Fig. 1. Fig. 8 is an elevation of the preferred form of condenser coil in one half the scale of Fig. 1, showing a section through the condenser tank with cover. Fig, 9 is anl elevation of one form of refrigerating coil'in one half. the scale of Fig. 1. Fig. 10 is an end view of another form of double coil for either condenser or refrigerator. Fig. 11 is an enlarged section of the shaft coupling shown in F ig;` 3, with the shafts broken off. Fig. 12 is a diagram of an elevation of the refrigerator, showing the apparatus driven by an electric motor and a worm, the worm gear being placed over the fianges of the compressor casing. Fig. 13 is a plan diagram of the simplest form of apparatus, driven by electric motor with pinion, the spur gear being placed over the fiangesof the compressor casing. Fig. 14 is a plan diagram of a complete apparatus with a modified arrangement, showing condenser coils as shown in Fig. 8, refrigerator coils as shown in Fig. 10, and the shafts with couplings shown in Fig. 11, all driven by belt and pulley at the condenser end, and arranged with two independent refrigerating tanks. Fig. 15 is a plan diagram of another modified arrangement' showing the condenser' coils as in Fig. 10, the refrigerator coils as in Fig. 9, a shaft coupling as in F ig. 11 between condenser and compressor casing, with one refrigerator tank and middle bearing within same, all driven by electric motor with worm, and worm gear placed at refrigerator end of shaft. Fig. 16 is a plan diagram 'amazes 4by side of each other, both shown with upper part broken off. Fig. 18 is a cross section of the compressor shaft of Fig. 17,

showing the vapor outlets in elevation. Fig. l

19 is a horizontal section through the center of broken off parts of the compressor body,

vcompressor shaft and evaporator shaft shown in Fig. 17, showing the coupling of vapor and liquid passages.v Fig. 20 is a cross section along line of Figs. 17 and 19. Fig. 21 is an inside elevation of the .compressor housing shown in Fig. 17, withI shafts broken off and working weight shown in dotted lines while in working condition during clockwise rotation, showing the parts actuating the compressor pistons, and a part of the compressors and vapor passages broken of. Fig. 22 is a section along the broken line b-b of Fig. 21 looking downward. Fig. 23 is an enlarged section of a modified form of self closing liquid stop valve shown in Figs. 17 and 21. Fig. 24 is an end elevation of the evaporator shaft, showing the two vapor and two liquid passages within one shaft, as shown in Fig. 17.

. Within a hermetically sealed casing, made of metal suitable for the working fluid used, and made in halves, is located the entire machinery, consisting of one ory more, preferably four, compressors fori'the' compresi sion of the vapors 'of any kind of refrigerating fluid, preferably ammonia, theoutside surface of casing 1 forming the whole or only a part of the cooling surfaceof refrigerator R. Compressor bodyv2,I Figs.' 3, 5 and 6, tightly connected to and resting upon shaft 3, carries cylinder sleeves 4, which are fastened to body 2 by `collars 5 and' glands 7, and form with gaskets 6 the discharge chambers 8, which communicate with each other through ports 9. Gneside of shaft 3, (Fig. 1) carrying body 2 in the middle, is made hollow and forms with passage 10, which communicates with chambers 8 by one or more ports 11, the discharge concoils.

the shafts of the condenser and refri 'er Discharge valves 12 form the vcl'inder heads, slide in guides 13 and are balanced by springs 14. l Pistons 15 within sleeves 4Scentain the suctionI valves 16,` which are limited in their travel by pins 17 and fastened to .crosshead 19 by pins 18. Crosshead'V 19 forms the bearing for pin 20, to each end of which is rigidly connected one end of connecting rod 21, each of which has at its other end the bearing for pins 22. The outer ends of sleeves 4 are slotted to form a passage for pins 20, and form the guide for crosshead 19.

On each side of body 2, (Figs. 4 and 5) is located a crank plate 23, to which are rigidly connected the pins 22, and which are always, held parallell with the axes of the compressor cylinders by four pairs of cranks 24 of which each pair is connected together by a shaft 28. Crank shafts 28 have their bearings on the circumference of the body 2, to which they are held by covers 29, and crank plates 23 contain the bearings for pins of cranks 24. By means of the four double cranks 24 the two crank plates 23 move exactly` together and prevent a dead center on any compressor, of which any number may be operated by one pair of crank plates 23, held in position by only one member overbalancing the Working load of all compressors.

Crank plates 23 have'a centrally located circular opening through which shaft 3 passes freely, land the circumference of which rests upon rollers 25, preferably provided vvith ball bearings, running on pins 26 rigidly connected to bearing collars 27, which are also preferably provided with ball bearings and run upon shaft 3. To bearing collars 27 is connected a weight 30 by straps 31, (Figs. 1, 2 and 4) cast Within weight 30 which is preferably made of lead. Weight 3 0 holds the rollers 25 in relatively eccentric position while plates 23 together with shaft 3 and all compressors revolve, thereby causing the pistons 15 to reciprocate the plates 23 revolving around an axis eccentric to the shaft 3 which carries the cylinders.

Shaft 3, Fig. 1, performs other duties besides carrying all compressors and weight 30, and forming discharge passage 10. It also forms a tie rod between the heads of casing 1 to prevent any bulging of the casing while the apparatus is not 'in operation and therefore under high pressure caused by equalizing of condenser pressure with the refrigerator pressure. Besides, the half of shaft 3 opposite passage 10 is solid when the apparatus has its simplest form as shown in Fig. 13, in which the surface of the casing 1 issuiiiciently large for refrigerator R. But if the surface of'casing 1 is not sufficient and additional surface is provided in the form of jseparate refrigerating coils coupled to casing l, shaft 3 has a passage 32, forming a suction connection for pipes 33 within refrigerator R.

bricated'by the splashing of oil and liquid fiuid contained in casing 1, but the rollers 25 and bearing collars 27 are oiled by a wiper 37, carried by bearing collars'27, and constantly supplied with oil by a number of lugs 38 fastened to the inside circumference of casing 1, which prevent the wiping off of grit accumulating on the inner circumference of casing 1.

Wiper 37 consists of a frame placed on top of bearing collars 27, the flanges or ribs of which lead the oil into oil boxes 39 located on top of bearing collars 27 and provided with fine meshedu screens 40. From boxes 39` the oil passes by gravity through ports 41 Within pins 26 to the bearing surfaces of rollers 25 and bearing collars 27.

Upon a shaft 42, (Fig. 1) containing a passage 43 as a continuation of passage 10, for passing the compressed vapors to the condenser, and a passage 44 for passing the liquid Huid from the condenser to casing 1, are mounted any desired length of pipes 45, wound into one or a number of coils, for the condensation of the Huid vapors compressed in casing 1. Shaft 42 is coupled to one end of shaft 3 by a screw thread 46, and stepped off to fit the steps Within caps 34, closing with gasket 47 the apparatus tightly against the outside atmosphere, and forming within caps 34 an annular space 48, see Fig. 7, for the distribution of the liquid fluid coming through passage 44 from the pipes 45, regardless of the relative position of passage 44 and the self closing stop valve 49 connected to caps 34. Shaft 42 is locked to casing caps 34 by keys 64, andto shaft 3 by pins 65, and rests upon bearings 50 and 51.

As an extension of passage 43, a small passage 52 is provided for a connection with gauge 53, placed at the extreme end of shaft 42 for registering the condensing pressure within pipes 45.

Shaft 42 may be extended beyond bearing 51 for the reception of a pulley or gear 55 for driving the entire apparatus, and is provided at the end of passage 43 with a stop valve 5 6, and at the end of passage 44 with a comblnation regulating and stop valve 57 12o To the heads of casing 1 are welded caps.

34, in which shaft 3 rests, and which are internally stepped oif for the reception of gaskets for tightly closing passage 1Q against for the regulation of the flow of liquid Huid to the refrigerating pipes, and consequently for the regulation of the Working pressure Within casing 1 for any desired service. If both valves 56 and 57 are closed. the entire condenser may be removed from the apparatus and if only valve 57 is closed and the apparatus still running, the refrigerator coils together with casing 1 and the compressors may be exhausted and emptied, and can be dismantled after closing valve 56, all of the Working fluid being then stored within confilling annular space 48. A vcam 7 5,.-fastened to weight 30, (Figs. 1 and 4) pushes dens'ing pipes 45. Valve 56 is closed a d stem 76 of valve 49, (Fig. 7) cushioned and protected against the atmosphere by "a cap held in place by plunger 77, inwardly, with 58, and valve 57 likewise by a cap 59 Condensing pipes 45 are wound either to flat coils as shown in Figs. 1 and 8and fastened by straps 60 to carrying plates 61 resting upon shaft 42; or they may be wound into spiral coils as shown by Fig. 10, and fastened to shaft 42 by carrying rings 62 and stays 63. The diagrams of Figs. 13 and 14 show pipes 45 made up in fiat coils, and diag-rams' Fig.. 15 shows these pipes made up in spiral coils; The flat coils formed by pipes 45, sho wp as a condenser in Figs. 1,8, 13 and 14 are the preferred form, for reason` explained below 'in connection with the evaporator coils, the spiral coils' shown as acondenser inFigs. 10 and 15, being only a modification of the former.

For larger. size apparatus, shaft 42- is modified asWshown by Fig. 3, to enable the removal of vcondenser C Without opening vscrew thread 46. A shaft coupling 66 is placed between bearing 50 and valves 56. and 57. Coupling ,66, shown in detail in Fig. 11, has a gasket 67 for closing tightly gas passage 43, and a gasket 68 for'closing tightly the annular space 69, which is provided for forming a free passage for the liquid fluid regardless of the relative positions of passage 44 on both sides of coupling 66 ofy which one may be located as shown to the right of'F ig. 11 and the other as shown to theleft of Fig. 11 in. dotted lines.

The condenser coils are partly submerged within a tank 70, filled with water for condensing the compressed vapors within pipes 45. Tank 70- is provided with water-inlet 71, outlet or overflow 72, see Fig. 8, vand with a cover 73, which contains near the top louver shaped ventilators 74 for the escape of heat and moisture. For economizing cooling water, the overflowing and heated water may be re-cooled by any of the well known devices, such as air circulatingfans, cooling towers, sprays, or the like.

yFrom Fig. 8 it is apparent that the winding of pipes 45 in flat or lspiral coils must be. in a certain relation to the direction in which the coils rotate. For example, all coils shown in drawings are assumed in clockwise rotation, for which pipes 45 must be wound for a counter-clockwise travel of thevincoming vapor, thereby forcing all particles of liquid fluid' and oil toward the liquid end of a coil, or away from the vapor inlet, preventing a choking of pipes 45 as, fully eX- plaine 'in connection with the evaporator coils.

The liquid fluid accumulated before regulating valve 57, passes through the opening of said` valve into passage 44.0f'shaft 42,

every revolution'of casing 1, thereby lifting l ball 78 from its seat, to which it is held by spring 79 and the liquid. under condensing pressure, allowing the liquid iuid'to-pass through ports 80 of stem 76 and out through outlet 8l either direct into casing 1 or into pipe 82, (Figs. 1, 2 and 4) 0r into both at the same time if desired.

From pipe 82, fastened to the inside of casing 1 and connected together at the casing flanges by lugs 83, the liquid fluid passes through connecting fitting 84 into annular space* 85 formed between cap 34 and the shaft of the refrigerating pipes 33. a

When the apparatus 1s not in operation and stopped in a certain position marked on pulley or gear 55, in which balls 78 are pressed to their seats, no liquid fluid can pass through valves 49. p

In the simplest form of apparatus as shown by Fig. 13, casing 1 forms with its surface the refrigerator, consisting of awell insulated tank 87, with insulated cover 88. Tank 87 is partly filled with brine, asolution of common salt or chlorid of calcium in water, and of a strength or specific gravity suitable for temperatures to be p roduced. An outlet 89 for the coldest brine,

andan inlet 90 for the warmest brine, are] provided in tank 87 and the brine is circu-y lated in any well known manner Afor refrigerating either space, liquidsA and food stuffs, or for making artificial ice. If the apparatus shall be used for cooling air 'alone,.the

warm air may be circulated through the'.

cover 88, or through tank 87 and cover 88'y alike, in which case the brine is dispensed with, and only a small amount trickled over casing 1 to prevent the accumulation of heavy frost on the cold surface of casing 1 by the moisture of the air. If the surface of casing 1 is insufficient for theservi'ceivv required, it may` be increased by winding` pipes 33 around the casing, as shown by.

dotted lines on the lower part of Fig. land in diagram of -F i 16. In both cases only one valve v49 wit a free outlet Sl, is'. re-

quired, and pipe 82, lugs 83fitting,814i;` airx: v

nular' space 85 and rect into casing 1, froml which pipes 33 are assage 86 arenotrequired, the liquid fluld being discharged disupplied through connection 91, the vapors remains solid and is fastened to. cap 34by a nut 93 with ascrew thread'46vand'stepped off to fit ca 34. Gasket'47 closes the casing tightly, an yinut 93 forms bearing 94 (F igs.-

ythe latter.

13 and 17, also dotted lines in Fig. 1) and may be extended to receive pulley or gear 55 for driving the apparatus.

For still further increasing the refrigerating surface, or for dispensing with the use of casing 1 as a refrigerating surface and using same only as a housing for the compressors, as shown in Fig. 17 in which case the casing may be Well insulated and not placed within a tank 87, a shaft 93, having one end shaped like nut 93, is coupled to shaft 3. On shaft 93, containing a passage 95 as a continuation of passage 32 in shaft 3 for passing the vapor-ized fluid from pipes 33 into casing 1, also a passage 86 for passing the liquid fluid from the condenser to pipes 33, are mounted any desired number of feet of pipes 33, wound into one or any number of coils for the vaporization of the liquid refrigerant. Shaft 93a is coupled, tightened and locked to shaft 3 and casing 1 in exactly the same manner as condenser shaft 42, being in all details a duplicate of Vapor and liquid stop valves, not-shown on drawings, may be placed exactly in the same way as has been done with shaft 42, serving the same purpose as described with shaft 42 for condenser C.

As an extension of passage 95, a small passage 96 is provided for a connection with gage 97, placed at the extreme end of shaft 93a for registering the suction pressure within casing 1 and pipes 33. Shaft 93 rest.c in bearing 98, Figs. 1, 14 and 15, and may be extended beyond bearing 98 for the reception of a pulley or gear 55 for driving the apparatus, as shown in dotted lines in Fig. 1, if the main drive is not desired on the condenser side of the apparatus. Or both shafts 42 and 93 may be provided with pulleys or gears 55, one side for the main drive of the apparatus, and the other side for driving auxiliaries, such as brine circulating pumps, Ventilating fans for air circililation, propellers for ice tanks, or the li e.

Refrigerator pipes 33 are wound either to flat coils as shown by Figs. 1 and 9, fastened by straps 60 to carrying Aplates 61, resting upon a shaft 93,, or in spiral coils as shown by Fig. 10, fastened to shaft 93il by carrying rings 62 and stays 63. Diagram Fig. 15 shows the flat coils, and diagram Fig. 14 shows the spiral coils. Theat coils formed by pipes 33, shown as the evaporator in Figs. 1, 9 and 15, are the preferred form, as will be explained later, the spiral coils shown being only a modification of the former.

From Figs. 9 and 10, showing a clockwise rotation of the refrigerating coils, it may be seen that the Winding of pipes 33 must be in a certain relation to the direction in which the coils rotate, in order to free them constantly of the lubricating oil and to distrilh ute the liquid fluid evenly over a large internal pipe surface. For a clockwise rotation, the winding must permit the liquid fluid supplied through passage 86 to travel Within pipes 33 in a counter-clockwise direction, thereby forcing the vapors toward passage 95 and emptying the lubricating oil intermixed with the liquid fluid into casing 1, assisted by the flow of the vapor.

For larger apparatus, shaft 93a is modified as shown by Fig. 3, to permit the removal of the refrigerator coils without opening screw thread 46, and also for dividing the refrigerator R into a number of tanks 87 as shown by Figs. 3 and 14.

Next to bearing 94 is placed-a shaft coupling 66, shown in detail by Fig. 11 with gaskets 67 and 68, and with annular space 69, as fully described and for the purpose stated for coupling 66 of condenser shaft 42. All refrigerator coils are partly submerged in brine within a tank or a number of tanks 87, as described before for casing 1.

Bearing 94 is omitted in Fig. 1 as not required for a short shaft 93a with only one refrigerating coil, for which bearing 9-1 could be placed between casing l and coil, supported by a bar across tank 87, omitting bearing 98 and operating the coil overhang mg.

For a longer shaft 93tl with a number of coils in one tank 87 both bearings 94 and 98 are required, of which bearing 94 is supported by a stand or a cross bar 99, as shown in Fig. 15.

It is evident, that a great variety of modifications in the several parts of the complete apparatus can be made to meet the many different requirements for all kinds of domestic and industrial applications, without departing from my invention in the least. One of such modifications I show in Figs. 17 to 24 inclusive. If four compressors do not give the desired capacity of an apparatus, and it is desired to have the whole machinery and particularly the discharge valves 12 of the compressors accessible without disturbing the condenser and refrigerator, the external surface of the compressor housing is not used as refrigerating surface, but is instead insulated with a non-heat conducting material 100, as shown by Figs. 17 and 21. Only one half of casing 1 is used,

and connected, tightened and locked to shaft l held inan eccentric position to the compressors by four single cranks 24, turning with their shafts 28 in bearings 104 provided for on the compressor body 2, as shown by Figs. 17 and 22. Discharge valves 12 with covers 105, (Fig. 17) form the discharge.

chambers 8 on the circumference of housing M, being connected-together by a radial passage 106, (Figs. 17 and 21) which is connected with passage 10 in one end of shaft 3 by passages 107 within the body 2, and also by a radial passage 108, of which one half is formed by a groove on the circumference of shaft 3, and the other half by an internal groove in the body collar'` 109, as shown by Figs. 17 19 and 20.

The compression lof the vapors taking place during the outward travel of pistons 15, instead of during the inward travel as described before, roller 25, with pin 26, actuating crank plate 23, are placed below shaft 3, for performing the compression in the lowest, and the suction of the vapors in the highest part of the rotating housing M,

which is preferable for preventing the liquid fluid and lubricant from entering the compressor cylinders 103.

Shaft 3 forms a tie between the opposite halves of housing M, carrying as before the bearingl` collars 27 with' weight 30, but the discharge passage 10, vapor passage 32, liquid passages 44 and 86, and the self closing liquid stop valve 49, with a connecting passage 110 for stem 76, are all in the end of shaft 3 connectin with body collar 109, as shown by Figs. 1 18 and 20. Passage 32 terminates in a number of smaller passages 116, extending to the interior of.housing M, and forming the inlets for the vapors produced within evaporator pipes 33, into the housing M, which forms a vapor storage for the supply of the compressor cylinders 103, as shown by Figs. 18, 19 and 21.

Valve 49 is operated by oneV piston 15, whichl pushes stem 76 inward with every revolution, removing ball 78 from its seat, and allowing the liquid fluid to pass through ports 80, within passage 110, into passage 86 and thence into evaporator pipes 33. On the outward travel of piston 15, stem 76 is released, ball 78 is seated by spring 79 within housing 111, assisted by the condensing pressure within passage 44, and passages 110 and 86 are closed.

It is apparent, that the-machineryL housing M, being independent from condenser C and refrigerator R, can be dismantled,

and the discharge chambers 8 opened without disturbing the balance of the apparatus.

refrigerator shaft 112 are closed, without disturbing any part of the machinery within housing M.

The condenser C and refrigerator R are connected to housing M in series, and it is immaterial which of them is located next to4 housing M. In Fig. 17 I show an arrange: ment with refrigerator R neXt to housing M, and the condenser C at the end of the complete apparatus, each only in one unit, whereas each may consist-'of anumber of units.

Shaft 112, connecting with shaft 3 and body collar '109, contains passages 43, 44, 86 and 95, (Figs. 20 and 24) as extensions of passages 10, 44, 86 and 32 respectively in the end of shaft 3, and is pressed with gasket 113 against shaft 3 and bodyvv 2, tightly closing housing M. Gasket 114, between shafts 3 and 112, closes tightly all passages in kboth shafts against each other, and also against the Aoutside atmosphere. Shaft 112, preferably provided with vapor and liquid stop'valves, similar to valves 56 and 57, with caps 58 and 59, as shown in y Fig. 1, carries the evaporator pipes 33, wound 1n co1ls and mounted upon carrying plates 61, if used asa refrigerator,or it carries the condensing pipes 45, if used as a condenser, as described before.

To shaft 112, shown as a refrigerator shaft in Fig. 17, is connected by a coupling 117, the condenser shaft 42, which carries the condenser pipes 45, as described before.

If shaft 112 is used as a condenser shaft, a refrigerator shaft similar to shaft 93a, descrlbed before, is `connected to shaft 112 by a coupling 117, or a number of shafts 112 -may be coupled together and connected to housing M, and anumber of shafts similar to shaft 42, or to shaft 93, may be coupled together by couplings 117, and connected to shafts 112 as described, all shafts being rotated simultaneously with machinery hous-v ioo Having thus described the construction -of all parts of my apparatus, I will now outline their operation.

The apparatus is charged with the required amount of fluid and lubricating oil through passage 96, which is preferably valved, after the air has been exhausted from all pipes, passages, compressors, casing and housing. Flowing water is turned on to supply condenser tank 70, brine is supplied to refrigerator tank 87, and any kind of' power is supplied to pulley or gear 55, after valve 56 is opened wide, and valve 57 set for the required amount of fluid supply. While the apparatus is at rest, weight 30 hangs vertically upon shaft 3, and valve 49 is closed and prevents the fluid from entering casing 1 and pipes 33. When the apparatus is in motion, stems 76 of valves 49 are pushed inward with every revolution and supply the casing l and pipes 33 with liquid fluid, where it meets relatively warm surfaces which cause evaporation under ebullition. The heat required for the vaporization of the liquid fluid is taken from the brine surrounding casing 1 and pipes 33, whereby the brine is cooled for use of refrigeration wherever required. The

A,yaporized fluid collecting in casing 1 or in housing M 1s compressed by the compressors and delivered to pipes 45 wherethe vapors are cooled by the condensing water in tank and become condensed to liquid, which is vaporized over and over again as described before. While the apparatus revolves, weight 30 takes a more and more inclined position, until the compressors are under full load, under which weight 30 takes a position of about 45 degrees, or midways between the vertical and horizontal. If the compressor load should increase over and above full load, `weight 3() rises till it reaches a horizontal position, in which the load is about 40 per cent above full load. The least further increase of load causes weight 30 to revolve with the compressors, which then cease to work until the pressure in pipes 45 decreases,vwhich stops weight 30 from rotation and permits the compressors to Work again. The resultant of all the forces acting upon weight 30 through rollers 25 and pins 26 is greatest after one compressor has discharged its contents of vapor, or when the axis of the compressor has just passed v the yaxis formed by pin 26and the centroid of weight 30. Valves 49, placed between the axis of the compressors and the axis through the centroid of' weight 30, remain closed while weight 3() is rotating, and prevent the fluid supply during this period, because stem 76 can not come in contact with cam 75. Under normal condition weight 30 hangs upon shaft 3 practically at rest, while the compressors, with shaft 3, 42 and 93, or with shafts 3, 112 and 42, coupled together,

revolve. Rollers 25, actuated by Weight 30, hold crank plates 23 eccentric to the axis of the compressors by means of the four cranks 24, the pins of which describe a circle of a diameter equal to the stroke of the compressors. Connecting rod pins 22, connected to crank plates 23, must describe the same circle as the pins of cranks 24, thereby communicating through connecting rods 21 a reciprocating motion to pistons 15 and suction valves 16. On the suction stroke, the compressors being single acting, the pistons 15 are left a little behind of suction valve 16, forming with the ports within the latter, a passage for the vapors in casing 1 ory in housing M to enter the compressors. On the discharge stroke, valves 16 seat them'- selves in pistons 15, closing the compressor cylinders and compressing the vapors. When the pressure within the compressors reaches the condenser pressure or a point `just a little above that, discharge valves 12 open, allowing the compressed vapors to pass out into chambers 8 and through passages 10 and 43 into condensing pipes 45, where they condense.

It is evident, that the cold vapors within casing 1 or within housing M keep the compressors, all working parts and the lubricating oil very cold, thereby assisting in the thorough separation of fluid and lubricant, preventing vaporization of the oil and the formation of non-condensable gases, which is a common occurrance with the older type of apparatus which have the compressors within the hot condenser. It is also evident, that the compressors cannot be heated and the vapors entering same be rarefied, and that no superheated vapors can exist while all parts are surrounded with highly saturated vapors and particles of liquid fluid, which take up the heat of compression and deliver nearly saturated vapors to the condenser pipes. The entire cycle of operation is saturatic, which, as is well known, is the ideal performance of gas compressors, calling for the least expenditure of energy for their operation. If too much liquid fluid should enter the pipes 33,l any surplusrorVM not vaporized part passes into casing 1 or into housing M, and can safely pass through the compressors and discharge valves 12, which form the compressor heads.

It is apparent that weight 30 acts as a safety device against excessive pressures in the condenser pipes 45, and valves 12 act as a safety device against any damage to the compressors.

The entire apparatus, being completely sealed against any escape of fluid and lubricant, and being admirably adapted for electric motor drive, requiresno attendance beyo4 l that required for the power supply a al for the lubrication of the few outside hearings. In the absence of any fluid connection on the outside of the apparatus, it can be located anywhere, Within or Without the spaces to be refrigerated, and a large refrigerating capacity may be had by the distribution of any number of independent units, operated by electric motors direct at the places Where refrigeration is needed.

My invention is also very suitable for the refrigeration of cars, as it is portable and may be driven by belt, gear or chain from the Wheel aXles of a car.

For marine refrigeration is my invention most suitable, because ithas no outside connections for the Working fluid, of which no loss is possible and therefore no fluid for recharging the apparatus must be carried for a sea voyage of any duration.

What I claim is:

1. A refrigerating apparatus comprising a rotary casing forming the evaporator, a tank Within which said casing'is contained, a compressor rotating with said rotary casing and located Within the same, and operated by said rotation, a rotary condenser, a valved passage for the compressed vapors from the compressor to the condenser, and another valved passage for the liquid of the refrigerating fluid from the condenser to said evaporator.

2. A refrigerating apparatus comprising a rotary evaporator casing, a central shaft connecting opposite ends thereof, a compressor carried by and rotating with said shaft and in said casing, a Weight hung on said shaft and operatively connected to the compressor, and a rotating condenser having valved passages communicating with said compressor and said rotary casing respectively. f

3. In a rotary refrigerating apparatus, the combination of a rotary casingforming an evaporator, with refrigerating pipes Wound over the exterior surface of said casing for increasing the evaporating surface, the ends of said pipes communicating with the interior of said casing for circulating the liquid refrigerant Within said pipesy for vaporization. l

4. In a rotary refrigerating apparatus, the combination of a rotary casing forming the evaporator, a compressor therein operated by rotation thereof, for forcing gas to the condenser, condensing pipes wound in coils, and a shaft carrying said pipes and coupled to said rotary casing, ,said shaft having passages connecting the pipes With the casing and compressors respectively, for circulating the refrigerating fluid.

5. A refrigerating apparatus comprising a rotary casing forming an evaporator, compressors Within said casing and operated by the rotation thereof, a rotary condenser, and a shaft connecting said casing and condenser, said shaft connecting opposite ends maaaae of the casing and having a passage for the discharge of the compressed vapors `to the rotary condenser and also a passagefor conducting the condensed vapors of the refrigerating fluid from the condenser -to the interior of the casing.

6. A refrigerating apparatus comprising a rotary evaporator casing, a shaft connecting opposite ends pf r,said casing, compressors carried by said shaft in said casing and rotating With said casing, a Weight hung on said shaft, operating devices between the Weight and compressors, a condenser, and circulation passages connecting said condenser, compressors and casing. i

7. In a rotary refrigerating apparatus, the combination of a shaft, a casing thereon containing compressors and means to operate same, said casing `forming the first part of an evaporator, pipes Wound around the exterior of said casing forming. a second part of the evaporator, pipe coils Wound around the shaft and connected to one side of said casing forming a third part of the evaporator. said shaft being connected to said casing and containing passages for liquid fluid supply through said casing and vapor delivery to said casing, a condenser connected to the other side of said casing, and communicating With said passages in the shaft for the discharge of the compressed vapors to the condenser and for the return of the liquid' fluid to said casing and to said evaporator coils, means for regulating the supply of liquid fluid to said three parts of the evaporator, and means for transferring the refrigerant from the said three parts of the evaporator to said vapor passage in the shaft.

8. In a rotary refrigerating ap aratus, the combination, of a casing, a sha t tying the endsvof said casing together, a compressor carried by said shaft and rotating with said casing, means to operate said compressor, condensing pipe coils located on one side and refrigerating pipe coils located `on the other side ofsaid casing, lshafts carryin'g said condenser.v pipe coils andrefrigerator pipe coils, said condenser co1l shaft having a valved passage -for the compressed vapors from the compressor to said condensing pipes and another valved passage for the condensed vapors from said condensing coils to said refrigerating coils, said refrigerator coil shaft'having a valved passage for supplying said refrigerator pipes with liquid fluid from said condensing coils and another valved passage for delivering the vapors from said refrigerating pipes to said compressor Within said casing, said compressor shaft having a passage for discharging the compressed vapors into said vapor passage of the condenser coil shaft and a passage for receiving the vapors from said refrigerating pipe coils through said vapor passage within refrigerator coil shaft, and means for coupling said compressor shaft.

9. In a rotary refrigerating apparatus, a casing, a compressor and means for operating the same, in said casing, a shaft extending across said casing, a condenser, said shaft having a passage for discharging the compressed vapors to the condenser and also a passage for receiving the fluid from the condenser, self closing stop valves controlling the outlet from said fluid passage to the interior of said casing for intermittentlyr supplying the evaporator with liquid fluid from the condenser, a weight hung on said shaft, and a cam connected to said weight for opening said self closing stop valves.

10. In a rotary refrigeratlng apparatus, a shaft, a casing thereon forming an evaporator, compressors in the casing, carried by said shaft, two rings having bearings on the shaft, a Weight suspended by said rings and crank plates eccentrically mounted on said rings and operatively connected to the compressors for operating the same, said crank plates being carried with the shaft.

1.1.'A refrigerating apparatus, comprising a rotary evaporator casing, a condenser connected thereto and rotating therewith, and a compressor located within the evaporator casing, -and adapted to circulate fluid through the evaporator and the condenser, said compressor being operated by the rotation of the casing.

12. In a refrigerating apparatus, the combination of a refrigerator and a condenser arranged to rotate and having an axial connection with circulation passages therein permitting flow between the condenser and the refrigerator, and a pump located within the refrigerator and adapted to be operated by rotation thereof, to produce said flow.

13. In a refrigerating apparatus, the combination of a rotary casing, and its shaft, thc latter having circulation passages one of which opens into the casing, a pump cylinder carried by the shaft and communicating with the other passage, a piston working therein, a weighted ring suspended from the shaft, and a crank plate mounted eccentrically on the ring and rotating with the shaft and connected to the piston to operate the same.

14. In a refrigerating apparatus, the combination of a. rotary casing, and its shaft having circulating passages one of which is provided with a valve which opens into the casing, a compressor carried by the shaft, a weighted ring suspended on the shaft, means carried by said ring to open said l5. In a refrigerating apparatus, the combination of a rotary casing and its shaft, the

llatter having an outlet passage and also an valve at each rotation of the shaft, and.

crank devices carried by the shaft and operated by the ring when the shaft is rotated, to operate the compressor, the latter communicating with the other of said passages.

inlet passage, a plurality of compressor cvlinders arranged around and carried bv said shaft and communicating with said outlet passage, pistons working in the cylinders, a weighted ring hung on said shaft and having an eccentric bearing roller, a plate rotating with the cylinders and connected to the pistons to operate the same, said plate traveling on said roller, for the purpose stated.

16. In a refrigerating apparatus, the combination of a rotary casing and a shaft extending within the same, a plurality of compressor cylinders arranged around said shaft and rotating therewith, a frame connecting said cylinders, a plate extending around the shaft beside` said cylinders, cranks connecting the plate and the frame, and a weighted ring hun on the shaft and having an eccentric bearmg on which said plate 1s supported, to operate the plate as the cylinders are rotated. 4

. 17. In a refrigerating apparatus, in combination, an evaporator, a condenser connected thereto, and a compressor arranged to circulate a volatile fluid through the evaporator and condenser, said compressor being inclosed in the evaporator and exposed to the cooling action of the fluid therein.

18. In a refrigerating apparatus, a shaft and means to-rotate thesame, a condensing coil mounted on the shaft, means to cool the coil, and means to circulate a volatile fluid through the coil as it rotates, in a direction opposite to the direction of rotation.

19. A refrigerating apparatus comprising an evaporator, a condenser connected thereto, a casing connected tothe evaporator and condenser, a compressor located within the casing and adapted to circulate a volatile fluid through said evaporator and condenser, and a motor operating said compressor and located external to the casing and also external to said evaporator and condenser.

20. In a refrigerating apparatus, the combination of a rotary evaporator casing, a 'compressor in said casing and means to operate the same by the casing, a condenser communicating with the compressor, and an evaporating coil external to the casing and communicating at one end therewith and at the other end with the condenser. 21. In a refrigerating apparatus, the cornbination of a shaft, a condenser mounted thereon, an evaporator casing mourned thereon, an evaporator coil also mounted thereon, a compressor in the casing and op-I erated by rotation of the shaft, a passage from the compressor to the condenser, a return passage from the condenser to the coil, and a passage from the coil to the casing.`

22. In a refrigerating apparatus, the combination of a closed evaporator casing adapted to contain lubricant, and. having projections therein', a shaft on which the casing is mounted, a compressor mounted on the shaft, mechanism to operate said compressor when the shaft is rotated, and means to lubricate said mechanism, including a weighted wiper projecting toward the inner surface of the casing and adapted to collect lu bricant from said projections.

23. In a refrigerating apparatus, a condenser comprising a shaft having inlet and outlet passages, a spiral coil mounted on said shaft and connected at its opposite ends to said passages gespectively, the coils increasing in diameter, toward the outlet end thereof, whereby the condensed fluid tends to How toward the outlet as the condenser is rotated.

24. In a refrigerating apparatus, the combination o f a closed evaporator casing adapted to contain lubricant, a shaft extending through the casing and on which it is mounted, a compressor mounted on and carried by the shaft, in the casing, mechanism to operate said compressor when the shaft is rotated, said mechanism being located in part on opposite sides of the compressor, and a weighted yoke through which the compressor passes at each revolution, said yoke being suspended on the shaft and projecting toward the casing to wipe lubricant therefrom and having guides for the lubricant leading to the bearings of said mechanism.

25. In a refrigerating apparatus, in combination, an evaporator, acondenser connected thereto, a compressor within said evaporator and arranged to circulate a volatile fluid through the evaporator and condenser, a motor operating said compressor and located external to said evaporator and condenser, said compressor being exposed to the fluid under ebullition and saturated fluid vapor within said evaporator for the purpose of absorbing the heat produced by operating the compressor.

26. In a refrigerating apparatus, a receptacle adapted to contain a volatile Huid under pressure, comprising a shaft provided with a liquid passage and with a vapor pas# sage for the fluid, a disk shaped pipe-support mounted on the shaft, pipes wound in a spiral coil of outwardly increasing diamenieaaaa ters mounted on said pipe support, and connected at the end of the largest spiral to said liquid passage, and at the end of the smallest spiral with said vapor passage, means to rotate said spiral coil, pipe support and shaft within a fluent material, means to circulate a volatile fluid through said spiral coil as it rotates, for exchanging heat with said fluent material, whereby the specific heavier liquid fluid occupies the spiral of largest diameter, and the specific lighter gaseous fluid occupies the spirals of smaller diameter.

27. In a refrigerating apparatus, a receptacle adapted to contain a volatile fluid under pressure, comprising a shaft provided with a liquid passage and with a Vapor passage for the fluid, disk-shaped pipe supports mounted on the shaft, pipes wound in spiral coils of outwardly increasing diameters mounted on said pipe supports, and connected at the ends of the largest spirals' to said liquid passage and at the ends of the smallest spirals to said vapor passage, means to rotate said spiral coils, pipe supports and shaft within a fluent material, means to circulate a volatile fluid through said spiralcoils as they rotate, for exchanging heat with said fluent material, whereby the specie heavier liquid fluid occupies the spirals of largest diameters and the specific lighter gaseous fluid occupies the'spirals of smaller diameters.

28. In a refrigerating apparatus, in combination, a casing adapted to contain a volatile fluid under ebullition, an evaporator and a condenser connected thereto, a pump within said casing and adapted to transfer the liuid vapors from said evaporator and casing into said condenser, a motor operating said pump and located external to said casing, evaporator and condenser, means for equalizing the fluid pressures withinv said casing and evaporator, and means supplying said casing with liquid for the purposev of cooling said pump by the latent heat-of the liquid vaporizing within said casing under the` pressure existing within the evaporator. In testimony whereof, I allix my signature in presence of two witnesses.

' JOHN C. BERTSCH.- Witnesses:

F. N. SMITH, BERT SMITH. 

